USB 3.1 is the latest USB specification, the specification launched by Intel and other large companies.Compared with the existing USB technology, the new USB technology USES a more efficient data coding system, and provide a times more effective data throughput (USB IF association).It is fully backwards compatible existing USB connector and cable.

USB3.1 LOGO

USB3.1 start of compatible with existing software protocol stack and equipment, 5 GBPS, USB 2.0 hub and equipment products.A Thunderbolt Intel technology also welcome USB3.1 standard shape.Most characteristics of USB 3.1 contains a USB 3.0 [1].As the next generation of USB transmission specifications, USB 3.1 is often referred to as "SuperSpeed +", will be in the future instead of USB 3.0.[2]Process specification

On November 12, 2008, USB 3.0 after launch, brought 5 GBPS SuperSpeed high-speed transmission efficiency, additional provide 5 v / 0.9 A power supply.With the higher transmission rate requirements, and also hope to be able to improve the power supply ability, January 6, 2013, USB IF association (USB Implementers Forum) officially announced to launch a new USB 3.0 enhanced (that is, the USB 3.1).On July 31, 2013 announced the official start of the development of SuperSpeed 10 GBPS, December 3, 2013 USB 3.0 Promoter Group officially announced the birth of USB 3.1.In June 2014 at Computex Taipei 2014, the first formal ASMedia technology showcase native USB 3.1 chips, realize SuperSpeed +, namely SuperSpeed 10 GBPS rate.[3]

usb 3.1 have Type-A（Standard-A）、Type-B（Micro-B）and Type-C

Type-C pin

as checking code, transmission loss rate plunged to 3% (4/132), so the USB 3.1 not only enhance the bandwidth, transmission efficiency is improve a lot.In addition, compared with the Thunderbolt, USB 3.1 and Thunderbolt1 has also has the speed of 10 GBPS, and while a Thunderbolt 2 provide 20 GBPS, but only the original Thunderbolt 1 two independent 10 GBPS merged, into 20 GBPS one-way transmission, rather than a bidirectional, and the point of view, as long as a USB 3.1 device after the formal introduction, bandwidth speed and on the breadth of application is still quite an advantage.[4]The power supply specification

USB 2.0 compared with 5 v / 0.5 A, USB 3.0 provides 5 v / 0.9 A power supply.But people still hope stronger power supply capacity, and USB 3.1 (SuperSpeed +) power supply of the highest standard increased to 20 v / 5 a, power 100 w.Power supply specifications - USB Power Delivery (PD) USB, design is compatible with the existing USB 2.0 and USB 3.0 wire and connectors, new USB 3.1 Type - C connectors are also widely spoken.USB PD support higher voltage and current, to meet different application device, also compatible with the existing USB 'Charging Charging 1.2 specifications.USB PD for port to port, the architecture of the USB from electric power communication signal, the power supply is through the host and device the VBus protocol to communicate, if the device supports, can be in accordance with the configuration (Profiles) of voltage and current, provide higher wattage supply.USB PD in accordance with the device is divided into five different configuration (Profiles), all you need to use the new can detect wire, can provide greater than 1.5 A or 5 v power.Configuration for mobile phones, 1 to 5 v / 2 A (10 W), the basic power output, than the USB 3.0 5 v / 0.9 A more (4.5 W);Configuration of 2 to 5 v / 2 A or 12 v / 1.5 A (maximum 18 w), can charge the battery for tablets and laptops.Configuration 3 to 5 v / 2 a or 12 v / 3 a (can provide larger laptops maximum 36 w power);The configuration is 4 to 20 v / 3 A (60 w), but only Micro - A/B connectors, the configuration is 5 to 20 v / 5 A power supply (100 w), only the TYPE - A/B connectors.USB 3.1 power has increased, and support the application of charging will make USB 3.1 is expected to be unified mobile phone, tablet, computer transmission interface。

22 on the four big improvementThe editor

Keep the cell phone faster chargingDue to power supply standard up to 20 v / 5 a, 100 w power, USB 3.1 can greatly promote the speed of charging equipment, but also for a laptop, projector, and even TV higher power equipment such as power supply, which is why apple's new MacBook only need a built-in USB Type C, can realize the power supply, transport demand.Higher data transmission speedBecause the USB 3.1 support up to 10 GBPS transmission rate, will greatly boost mobile transmission speed, this is very beneficial to the development of mobile phones.For example, a growing number of mobile phone to support 4 k video shooting, video file is more big, faster data transmission speed is necessary.Support the display outputCurrently, HDMI is widely used in TV, monitor product interface standard, although have a mini version, but not phone special built-in the interface, because can lead to rising costs, increased volume.And USB 3.1 support display output, so more suitable for as output interface of mobile devices, especially the Type of reversible - C.generalityObviously, a universal common interface, it is required for small devices like mobile phones, tablet, can greatly improve the connectivity of the equipment.But for now, the Type of USB 3.1 - C most likely to become the future standard of connection, provide data transmission, connecting peripherals, such as display output integration connection scheme.[5]